Enlargement of the prostate gland is common in older, un-neutered male dogs because lifelong exposure of the gland to testosterone causes hypertrophy, writes veterinarian Jeff Kahler. Symptoms of the enlarged gland, including increased urination with little or no urine produced on some attempts and blood in the urine, can also be caused by other urinary tract problems. Treatment involves antibiotics if a urinary tract infection is present, as well as castration, writes Dr. Kahler.

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